Resources Contact Us Home
Control system for permanent magnet synchronous motor

Image Number 14 for United States Patent #5854547.

To provide a control system for a permanent magnet synchronous motor which can ensure stability of the current control system, even if the revolution frequency of the motor becomes higher and the terminal voltage of the motor exceeds the inverter maximum output voltage. In this method, when the revolution frequency of the motor exceeds a specified value, the size of the voltage vector is made a specified voltage vector, and a modulation factor based on its value is obtained. At the same time, a magnetic flux direction current correction value is found based on the size of a voltage vector from a polarity coordinates conversion unit and the above specified voltage vector size. Then, the magnetic flux direction current instruction is corrected by that value.

  Recently Added Patents
Luminescent substrate for liciferase
Method for improving the performance of browser-based, formula-driven parametric objects
Systems and methods for a signed magnitude adder in one's complement logic
Methods and devices for creating, compressing and searching binary tree
Backup and recovery of distributed storage areas
Electronic component and reflected-wave cancelling method
Synchronization processing circuit and synchronization processing method in wireless communication system
  Randomly Featured Patents
Collar apparatus for retaining a cold or hot pack insert
Disc player
Binding of particulate materials to manufacture articles
Wire stripper
Infrared fiber optic light
Paper roll dispenser
Signal correlation technique
Bi-directional serializer/deserializer with discretionary loop-back
Squarylium charge generating dye and electrophotographic photoconductor